It's difficult to know what happened since it's not my pc. Anyway, my brother had Shogun 2 on Steam. He played it several times. Then one day he told me the game was no longer there. Sure enough I checked his Steam account, games library, making sure that I selected "all games"... and it wasn't there However when I checked his Steam folder C:\Program Files (x86)\Steam\steamapps\common there was a folder for the game. I don't remember if I tried to launch it from the folder directly, but I know for sure that launching it through the desktop shortcut gave me some error. What has he done? I suspect he uninstalled the game by mistake and now needs to download it again.... But then I myself have uninstalled some Steam games - they still appear on my games list, only greyed out. In his case Shogun 2 doesn't appear at all. Not even greyed out.